Modifications in the kinetics of transesterification of sunflower oil over strontium supported on silica by barium doping | ||
| International Journal of Development | ||
| Article 3, Volume 11, Issue 1, 2022, Pages 27-38 PDF (632.05 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/idj.2022.281278 | ||
| Authors | ||
| Mona Abdel Fattah; Salah A. Hassan; Abdel Naby M. Abdel Naby; Hany M. AbdelDayem* | ||
| Chemistry department, Faculty of Science, Ain Shams university 11566 Abbassia, Cairo, Egypt | ||
| Abstract | ||
| The effect of doping of strontium/silica (Sr40/ Si-Aocta) catalyst by barium on its kinetics of methanol transesterification of sunflower oil (MTSFO) to biodiesel was investigated. The experimental data of MTSFO over Sr40/Si-Aocta appear to be good fit into pseudo first order kinetic mechanism. However, the zero-order rate equation is the best fit model for MTSFO over BaSr40/Si-Aocta, compared with the pseudo-first order and second-order rate kinetic models. On the other hand, the intraparticle diffusion kinetics model may also play an important role in the MTSFO over BaSr40/Si-Aocta. In addition, a significant change was observed in Arrhenius activation energy of MTSFO over Sr40/Si-Aocta when it dopped by Ba. Where, Arrhenius activation energy values were found to be 16.6 and 49.6 kJ mol-1 for Sr40/Si-Aocta and BaSr40/Si-Aocta , respectively. These results can be suggested that addition of Ba toSr40/Si-Aocta can enhance its catalytic performance in selective MTSFO. | ||
| Keywords | ||
| Transesterification; biodiesel; kinetics; strontium; barium; catalysts | ||
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